diff --git a/addons/hr_payroll/hr_payroll.py b/addons/hr_payroll/hr_payroll.py
index 563092c74a9..d5e11e1d5b3 100644
--- a/addons/hr_payroll/hr_payroll.py
+++ b/addons/hr_payroll/hr_payroll.py
@@ -475,7 +475,9 @@ class hr_payslip(osv.osv):
         def _sum_salary_rule_category(localdict, category, amount):
             if category.parent_id:
                 localdict = _sum_salary_rule_category(localdict, category.parent_id, amount)
-            localdict['categories'].dict[category.code] = category.code in localdict['categories'].dict and localdict['categories'].dict[category.code] + amount or amount
+            if category.code in localdict['categories'].dict:
+                amount += localdict['categories'].dict[category.code]
+            localdict['categories'].dict[category.code] = amount
             return localdict
 
         class BrowsableObject(object):
diff --git a/addons/web_calendar/static/src/js/web_calendar.js b/addons/web_calendar/static/src/js/web_calendar.js
index e3cc6e0e8d4..c2b5a005c5a 100644
--- a/addons/web_calendar/static/src/js/web_calendar.js
+++ b/addons/web_calendar/static/src/js/web_calendar.js
@@ -961,13 +961,7 @@ openerp.web_calendar = function(instance) {
             this.$input = $();
         },
         get_title: function () {
-            var parent = this.getParent();
-            if (_.isUndefined(parent)) {
-                return _t("Create");
-            }
-            var title = (_.isUndefined(parent.field_widget)) ?
-                    (parent.string || parent.name) :
-                    parent.field_widget.string || parent.field_widget.name || '';
+            var title = (this.options.action)? this.options.action.name : '';
             return _t("Create: ") + title;
         },
         start: function () {